KR19990086090A - Resin composition containing plant root growth regulator, method for producing the same, and use thereof for producing molded containers for plant cultivation - Google Patents

Abstract

The present invention relates to a resin composition containing a plant root growth regulator, specifically (A) 60 to 100% by weight of a single or composite resin of styrene-based, olefin-based and acrylic resins; (B) a resin matrix composed of 0 to 40% by weight of a biodegradable, disintegratable and water-soluble polymer; (C) Since the resin composition containing 0.001 to 30% by weight of the plant root growth regulator is prepared so that the plant root growth regulator of (C) is uniformly distributed on the resin matrix by a blending method using a conventional kneading extrusion apparatus, The root growth regulator is uniformly dispersed and surface-treated on the inner wall of the container, so that it can be usefully used to economically mass-produce the molded plant containers for plant cultivation, which have an effect of appropriately controlling root growth during plant cultivation.

Description

Resin composition containing plant root growth regulator, method for producing the same and use thereof for the production of molding containers for plant cultivation

The present invention relates to a resin composition containing a plant root growth regulator, a method for producing the same, and a use thereof for the production of molded articles for plant cultivation containers.

More specifically, (A) 60-100 weight% of single or composite resin of styrene type, an olefin type, and acrylic resin; (B) a resin matrix composed of 0 to 40% by weight of at least one biodegradable, disintegratable, water soluble polymer; (C) A resin composition containing 0.001 to 30% by weight of plant root growth regulators and a blending method using a conventional kneading extrusion apparatus to prepare the plant root growth regulators of (C) to be uniformly distributed on the resin matrix. The present invention relates to a plant cultivation container molded article uniformly treated on the surface thereof.

When planting seeds or temporarily cultivating seedlings of crops in molded products, such as pots treated with root growth regulators before transplanting them to the packaging, the roots of the plant by the root growth regulators By controlling the growth, it is possible to promote the generation of fine roots and transplant them into the package to maintain smooth lubrication, vitality, and strengthening resistance to diseases, and to remove pots and prevent root cutting during transplantation. Can be obtained.

In this regard, research on various plant root growth regulators and techniques for treating and administering them in various ways have been developed. Representative plant root growth regulators include cupric hydroxide, cupric carbonate, cupric sulfate, cupric oxide, cupric ammonium carbonate , Copper ionic compounds such as cupric naphthenate has been reported to be excellent in the effect, in addition to methyl alpha-methoxyimino-alpha-substituted phenyl acetate (methyl alpha-methoxyimino-alpha-substituted phenyl acetate), 1- (1,2,4-triazol-1-yl) -2,3-diphenyl-2-butanol [1- (1,2,4-triazol-1-yl) -2,3 -diphenyl-2-butanol] and pentachlorophenol have been reported to play a role as a bactericidal and root growth regulator (J. Environ. Hortic., 14 (4), 191-193 (1996) Hort Science, 31 (6), 941-943 (1996); Tenn.Farm Home Sci., Prog.Rep., 103, 24-6 (1977); Calif.Agr., 23 (10), 16-18 ( 1969), etc) .

As a conventional method of treating and administering the plant root growth regulator as described above, the plant root growth regulator may be directly applied by making a liquid composition, or impregnated with a nonwoven fabric, or treated with an inner wall of a container (Pot, Plug tray, etc.). Spraying, painting, or spreading (WO 9403057; WO 940217; FI 59524 B; JP 7706758; JP 8023785; JP 7099837; JP 6113679; GB 2223920 A; DE 3017123 A; ZA 9208985, etc.).

However, in such a conventional method, the process of treating the liquid composition of the drug on the inner wall of the container was a very cumbersome and laborious task, and evenly, it is not easy to apply and surface treatment, in some cases rather weak. In addition, the seeding and seeding (Seedling & Planting) is automated to produce a variety of cultivation containers are mechanically produced in this case there is a problem that the surface treatment of the inner wall of the drug is difficult.

Therefore, the plant root growth regulator is uniformly surface-treated on the inner wall of the pot during cultivation in the seed or seedling pot, and the resin composition can produce various cultivation vessels at low cost while being able to exert smooth efficacy and on the other hand, There has been an increasing demand for the development of various molded articles thereof and their manufacturing methods.

Therefore, the present inventors drastically improve the troublesome, troublesome and uniform application of the conventional method of surface treatment of the conventional plant root growth regulators on the inner wall of the cultivation container, which meets the above requirements, and responds to the automation system, In order to develop a resin composition which enables mass production of cultivation containers uniformly treated on the surface and a method of manufacturing the same, (A) styrene-based, olefin-based, acrylic resin alone or composite resin 60-100 Wt%; (B) a resin matrix composed of 0 to 40% by weight of at least one biodegradable, disintegratable, water soluble polymer; (C) Since the resin composition containing 0.001 to 30% by weight of the plant root growth regulator is prepared so that the plant root growth regulator of (C) is uniformly distributed on the resin matrix by a blending method using a conventional kneading extrusion apparatus, By cultivating seeds and seedlings in the molded containers manufactured using this, the present invention was completed by confirming that excellent root growth control effects could be obtained.

An object of the present invention is to provide a resin composition and a method for producing the same, which can be used to mass-produce a plant cultivation container molded product whose drug is uniformly treated on the surface simply and economically.

1 shows a comparison of root growth types of cucumbers grown for a certain period of time in a molded product prepared using the composition according to the present invention and a thermoformed molded product using a conventional resin alone,

Figure 2a shows a comparison of the root growth type of cabbage grown for a period of time in a molded product prepared by using the composition according to the present invention and the thermoform molded molded by the existing resin alone,

Figure 2b is a comparison of the rearing state of the cultivated cabbage grown for a period of time in the molded product prepared by using the composition according to the present invention and the thermoformed molded by the existing resin alone,

Figure 3a shows a comparison of the root growth type of tomatoes grown for a period of time in the molded product prepared by using the composition according to the present invention and the thermoformed molded by the existing resin alone,

Figure 3b shows a comparison of the rearing state of the tomatoes grown for a period of time in the molded product prepared by using the composition according to the present invention and the thermoformed molded by the existing resin alone.

In order to achieve the above object, the present invention (A) 60 to 100% by weight of at least one resin component selected from styrene resin, olefin resin, acrylic resin; (B) a resin matrix composed of 0 to 40% by weight of a biodegradable, disintegratable and water-soluble polymer; (C) 0.001 to 30% by weight of plant root growth regulator; It provides a resin composition containing.

In addition, the present invention comprises the steps of 1) mixing the resin composition of the present invention at room temperature using a mixing means having a rotary stirring means; 2) kneading and extruding the mixture by kneading extruding means; to provide a method for producing a resin composition to uniformly disperse the plant root growth regulator in the resin matrix.

Moreover, this invention provides the use which uses the resin composition of this invention for manufacture of the molded container for plant cultivation.

Hereinafter, the present invention will be described in detail.

The resin composition of the present invention comprises: (A) single or composite resins of styrene-based, olefin-based and acrylic resins; (B) biodegradable, disintegratable, water-soluble high polymers; (C) includes plant root growth regulators.

The styrene-based, olefin-based or acrylic resins include polystyrene-based resins, polyethylene or polypropylene-based resins, polyacrylic-based resins, and / or modified resins thereof, and various commercially available styrene-based, olefin-based and acrylic-based resins may be used. Although both may be used, it is preferable to use general polystyrene (GPPS), polyethylene (PE), polypropylene (PP) or polymethyl methacrylate (PMMA) resin. Its content is preferably 60 to 100% by weight, more preferably 75 to 98% by weight.

Biodegradable, disintegratable, water-soluble polymers that are monodisperse or alloyed on the base resin matrix may include polyethylene glycol (PEG), polyvinyl alcohol (PVA), aliphatic polyester, starch, and the like.

Plant root growth regulators include cupric hydroxide, cupric carbonate, cupric sulfate, cupric oxide, cupric ammonium salt, Copper ionic compounds such as cupric nitrate, cupric phosphate, cupric naphthenate, cupric oxychloride or methyl-alpha-methoxyimino-alpha Suitable root growth regulators such as -substituted phenyl acetate, 1- (1,2,4-triazol-1-yl) -2,3-diphenyl-2-butanol, pentachlorophenol, alone or in combination Although it may be used, in particular, the compound should be a compound that does not lose its stability and activity when mechanically formulated into the base resin, it is preferable in terms of manufacturing cost. The content of the plant root growth regulator in the total composition is preferably 0.001 to 30% by weight, more preferably 0.01 to 15% by weight.

In addition to the above, the resin composition of the present invention may include various additives with almost no deterioration in mechanical, thermal and physical properties. At this time, the additives include plasticizers, antioxidants, mold release agents, antistatic agents, heat improvers, lubricants, biodegradable and degradable inducers, organic and inorganic fillers, impact modifiers, colorants (dyes or pigments), metallic micronutrients (iron, boron, manganese, zinc, molybdenum, magnesium).

Moreover, this invention provides the manufacturing method of the said resin composition. Specifically, the production method of the present invention comprises the steps of 1) mixing the resin composition of the present invention at room temperature using a mixing means having a rotary stirring means; 2) kneading the mixture by kneading extruding means; It includes.

At this time, the mixing means of step 1) uses a mixing means including a rotary blending means such as a ribbon blender, a V-type blender, a Henschel mixer, or the like. Mixing conditions are mixed for several minutes at several tens to thousands of RPM at room temperature.

As the kneading extrusion means of step 2), a kneading extrusion is performed using a conventional extruder, a Brabender Plasticorder, a Banbury mixer, a Mixing roll, a Kneader, or the like. It is preferable to adjust temperature of a suitably according to the base-matrix resin to be used.

In addition, the present invention provides a molded container for plant cultivation prepared from the resin composition of the present invention.

The resin composition according to the present invention may be prepared in various molded articles according to a conventional molding method, such molded articles may be 1) using the resin composition of the present invention alone, or 2) the resin composition of the present invention is located on the inner wall. It can be produced through injection molding, blow molding, extrusion molding and thermoforming using a method such as colamination or 3) adhesion. In particular, it can be manufactured into various shapes by extrusion molding and thermoforming into sheets.

The present invention will be described in more detail with reference to the following examples.

The following examples illustrate the invention but are not limited thereto.

Example 1 Composition of Resin Composition

As the resin component of (A), matrix resins such as polystyrene grade, SOLARENE ^R , polyethylene grade, and polypropylene grade, and polyethylene glycol (PEG, M _w 2,000), polyvinyl alcohol (PVA, M _w 16,000), and the like, as the plant root growth regulator of (C), various copper ion compounds were used in the components and contents shown in Table 1, respectively.

Composition and Content of Resin Composition Compositions of the Invention Control One 2 3 4 5 6 7 8 9 10 One 2 3 Component A (%) a 80.2 90.1 88.7 86.2 86.7 97.8 b 88.7 97.4 c 87.7 89.7 d 76.7 95.5 e 82.2 Component B (%) a 1.5 1.5 3.0 1.5 1.0 5.0 5.0 2.0 b 3.0 1.5 1.0 Component C (%) a 18.0 8.0 8.0 10.0 5.0 5.0 3.0 b 8 8 16.0 10.0 c 3.0 5.0 Component D (%) a 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 - - - b 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 c 4.0 2.0 1.0 3.0 2.1 ^* 2.5 ^* 4.4 ^* Aqueous phase Cu ¹⁾ (ppm) 68 67 66 <2 <2 61 51 <2 37 23 0 0 0 Surface Cu ¹⁾ (cps / A) 30.0 22.0 14.8 29.7 41.9 28 14 44 11 17 0 0 0 Processing method Sheet Extrusion-Thermoforming ejaculation Hollow Extrusion Hollow ejaculation Component A: a. Polystyrene G-1260 (SOLARENE ^R , Dongbu Hannong Chemical Co., Ltd.) (base sheet of two-layer sheet: SOLARENE ^R HIPS H-7240 base sheet) b. Polyethylene B-502 (HDPE, Daehan Petrochemical) c. Polyethylene SF-318 (LLDPE, Hyndae Petrochemical) d. Polypropylene 4017 (Daehan Petrochemical) e. PS / PE alloy DH-200 (SOLAROY ^R , Dongbu Hannong Chemical) Component B: a. Polyethylene Glycol (PEG, M _w 2,000) b. Polyvinyl alcohol (PVA, M _w 16,000) ・ Component C: a. CuSO ₄ , b. CuCO ₃ , c. Cu (OH) ₂ Component D: a. Antioxidant b. Polydimethylsiloxane, 1,000 cSt c. Starch *: amount of other additives ¹⁾ Cu: AA, XRF analysis value in aqueous phase and surface of the molding after the molding was immersed in an aqueous solution for 40 hours.

Example 2 Component of Resin Composition

In addition to the resin composition illustrated in Example 1, additives of component (D) such as antioxidants, heat resistance improvers, and mold release agents were added. Specifically, a is an antioxidant, b is a polydimethylsiloxane, and a release agent, and c is a starch, which is used as a biodegradable and disintegrating inducer.

Degradation of the resin itself of the resin composition prepared by the addition of additives and modification of the copper ion compound, and the degree of dissolution of the copper ions onto the aqueous solution were confirmed to show excellent stability and activity as shown in Table 1.

Example 3 Preparation of Resin Composition

The components of Table 1 were physically mixed at 100 to 1,000 rpm at room temperature for 5 minutes using a Henschel mixer, and then the mixture was twin screw extruder (L / D = 25 at 130 to 280 ° C). Kneading was carried out in the range of 300 to 300 using a screw RPM, and pellets of the resin composition of the present invention were prepared by a strand cutting method.

It was confirmed through the copper ion detection test that the copper ion compound and the like were uniformly dispersed in the resin composition prepared as described above.

In the copper ion compound detection test, the prepared resin composition was immersed in water for 40 hours, and then the concentration of copper ions eluted on the aqueous solution was compared according to the type of copper ion compound and the type and content of additives.

Example 4 Preparation of Molded Containers

The resin composition prepared in Example 2 extruded a rubber-modified polystyrene grade (SOLARENE ^R , Co., Ltd.) as a basic sheet, and co-extruded the sheet to a thickness of 20 to 100 µm to form a two-layer sheet. After manufacturing or sheet-forming alone, thermoforming was performed to make thermoforming products such as plug trays.

Alternatively, the resin composition was directly produced through processing such as injection molding and blow molding.

In order to confirm that the copper ion compound and the like are uniformly dispersed on the inner wall of the molded product prepared as described above, a copper ion detection test was performed. In the copper ion compound detection test, the molded product prepared in Example 3 was dipped in water for 40 hours, and then the copper ion eluted in the aqueous solution was detected, and the concentration of the copper ion detected on the surface of the molded product was determined by the type and additive of the copper ion compound. According to the type, content of the comparative test and the results are shown in Table 1.

Example 5 Investigation of Root Growth Regulatory Ability

Seedling soil for the same standard prepared by the product of the resin composition of the present invention by the method of Example 4 and the general resin composition of the control example containing no plant root growth regulators And seedlings of cucumbers, peppers, tomatoes, cabbages, cabbage, and the like, and after a certain period of time, the growth status of the seedlings and the regulating effects of root growth were compared. Table 2 and FIGS. 1 to 3 Represented in each.

Effects of Growth and Root Volume Control by Crops by Various Treatments division cucumber tomato cabbage pepper Ground growth ¹⁾ Root Control ²⁾ Above ground growth ¹⁾ Root Control ²⁾ Above ground growth ¹⁾ Root Control ²⁾ Above ground growth ¹⁾ Root Control ²⁾ No treatment ◎◎◎ ○○ ◎ ○ ◎ ○○○ > 95%> 90%> 95% 30% 30%> 90% 50%> 85% 30% 60% 0 ◎◎◎ ○○ ◎ ○ ◎ ○○○ > 95%> 90%> 95% 20% 20%> 90% 50%> 85% 30% 60% 0 ◎◎◎ ○○ ◎ ○ ◎ ○○○ > 95%> 95%> 95% 50% 50%> 90% 70%> 90% 50% 70% 0 ◎◎◎ ○○ ◎ ○ ◎ ○○○ > 95%> 80%> 95% 30% 30%> 90% 40% 75% 30% 40% 0 ¹⁾ The results of comparing the crop and face the above-ground growth after a period of time grown in untreated after sowing the seed to the root control accuracy by the good ○ 30% or more untreated than the ◎ untreated Growth Growth ²⁾ drug treatment It is expressed as a percentage. (100% perfect control effect)

As shown in Table 2 and Figs. 1 to 3, when the plants are grown in the molding container made of the resin composition of the present invention, excellent root growth control effect can be obtained, and growth of the ground part is also remarkably excellent, whereas the component (C In the case of using a resin composition that is not blended), it can be seen that the effect of controlling plant root growth is hardly exhibited.

As described above, the composition of the present invention can be usefully used for economic mass production of various molded articles for seedlings, in which copper ion compounds and the like are effectively dispersed and surface-treated as plant root growth regulators. Therefore, when the plant is grown in the plant cultivation molding container according to the composition of the present invention, the root growth of the plant is controlled by the root growth regulator, thereby promoting the generation of fine roots and transplanting them on the package to maintain smooth lubrication, vitality and resistance to diseases. Effects such as strengthening can be obtained, and when transplanting, port removal can be easily performed and root cutting can be prevented. In addition, according to the composition of the present invention, the plant root growth control effect can be easily applied even in the automated system of seedlings, and can prevent and suppress various soil diseases caused by bacteria and fungi that occur on the roots when raising crops, and also the plug tray. Since the occurrence of moss and algae can be suppressed and prevented in molded articles such as the above, its use is noted in the future.

Claims (8)

(A) 60 to 100% by weight of at least one resin component selected from styrene resin, olefin resin and acrylic resin; (B) a resin matrix composed of 0 to 40% by weight of a biodegradable, disintegratable and water-soluble polymer; (C) 0.001 to 30% by weight of plant root growth regulator; Resin composition included. According to claim 1, wherein the plant root growth regulators cupric hydroxide (cupric hydroxide), cupric carbonate (cupric carbonate), cupric sulfate (cupric oxide), cupric oxide, cupric ammonium salt cupric ammonium salt, cupric naphthenate, cupric oxychloride, methyl-alpha-methoxyimino-alpha-substituted phenyl acetate, 1- (1,2,4-triazole -1-yl) -2,3-diphenyl-2-butanol, a resin composition comprising at least one selected from the group consisting of pentachlorophenol. The resin composition of claim 1, wherein the resin component comprises at least one selected from general polystyrene (GPPS), polyethylene (PE), polypropylene (PP), and polymethyl methacrylate (PMMA) resin. . The method of claim 1, wherein the biodegradable, disintegratable, water-soluble polymer is characterized in that it comprises at least one selected from the group consisting of polyethylene glycol (PEG), polyvinyl alcohol (PVA), aliphatic polyester, starch (Starch) Resin composition. The method according to claim 1, wherein in addition to the plasticizer, antioxidant, mold release agent, antistatic agent, heat improver, lubricant, biodegradable and destructive inducer, organic and inorganic filler, impact modifier, colorant (dye or pigment), metallic micronutrient Resin composition comprising at least one additive selected from the group consisting of. 1) mixing the resin composition of claim 1 using a mixing means having a rotary stirring means at room temperature; 2) kneading and extruding the mixture by kneading extrusion means; wherein the plant root growth regulator of claim 1 is uniformly dispersed in the resin matrix. The resin according to claim 6, wherein the mixing means is selected from a ribbon blender, a V-type blender, a Henschel mixer, and the kneading extrusion means is selected from an extruder, a plasticoder, a half-barrier mixer, a mixing roll, and a kneader. Method of Preparation of the Composition. A molded article made of the resin composition according to any one of claims 1 to 5.